Floor-scraping machine



(No Model.) 2 Sheets-Sheet 1. F. 0. SOHROEDER.

FLOOR SGRAHNG MACHINE.

No. 483,173. Patented Sept. 27, 1392.

UNITED STATES PATENT OFFICE.

FREDERICK C. SCIIROEDER, OF ALAMEDA, CALIFORNIA.

FLOOR-SCRAPING MACHINE.

SPECIFICATION forming part of Letters Patent No. 483,173, datedSeptember 27, 1892. Application filed June 10, 1891. Serial No. 395,757.(No model.)

To all whom it may concern:

Be it known that I, FREDERICK C. SCHROE- DER, a citizen of the UnitedStates, residing at Alameda, in the county of Alameda and State ofCalifornia, have invented certain new and useful Improvements inFloor-Scraping Machines; and I do hereby declare the following to be afull, clear, and exact description of said invention, such as willenable others skilled in the art to which it most nearly appertains tomake, use, and practice the same.

vide a smooth even surface thereon, and in providing regulatingmechanism whereby adjustability may be given unto the cutting-tool ofthe scraper.

My invention further consists in providing a scraper which shall besimpler in its construction, less expensive, and more effectual in itsoperation than any device of a similar nature heretofore known to me.

Referring to the drawings forming a part of this application, whereinsimilar letters of reference denote corresponding parts throughout theentire specification, Figure 1 is a side view in elevation, showing theentire machine; Fig. 2, a top plan of Fig. 1; Fig. 3, a crosssectionalview taken on line as m, Fig. 1; Fig. 4, a front view of Fig. 3, showingsupportingroller removed Fig. 5, a front elevation of Fig. 1; and Fig.6, an end view of the tool-holder, showing tool secured therein.

The letter A is used to indicate the side beams of the machine, and Bthe axle working in bearings formed in said beams. To the outer ends ofthe axle I secure wheels A for allowing the machine being moved acrossthe floor. The beams A run at an incline from center a to their outerends. To said beams are secured the curved supporting-braces B providedwith the inwardly-proj ectin g flanges b, adapted to form a support orseat for the tool-holder, hereinafter described. To said flanges Isecure the tool-holder O, which consists of the two sections 0 c, thelower one of which rests and moves upon flanges 12 of thecurvedsupporting-bracesBC Theupperends of said flanges are turnedupward, so as to form flanged end Z2, through which adj ustablescrew-bolts B work, the lower ends of which bear against thescraping-tool C, secured between the upper and lower sections of thetoolholder. These sections are united or held together, so as to firmlyhold the scraping-tool between them, by means of bolts 0 By looseningsaid bolts and tightening screw-bolts B cutting-tool C may readily bemoved downward or outward, so as to compensate for wear thereof.

By practical experiment I have ascertained that the material bestadapted for use as a sci'apingtool, which will obviate quick wearingthereof and present better scraping-edges, consistsof heavy glass theedges of which have been finely ground. Use of tools constructed of suchmaterial has demonstrated that floors may be scraped whereon metal toolswill take no hold whatever. Conse quently by preference I construct mytool of such material, which in length is the width of the machine, asclearly shown in the drawings, of one piece, and about one-half to oneand one-half inches in thickness.

As above stated, this tool is securely held between sections 0 o of thetool-support. As one edge becomes worn down the plate of glass orscrapingtool is turned over and the opposite edge presented to thefloor, and so on until all four edges have become worn down, when a newtool is inserted in place thereof.

It will be observed that I secure a scraping tool at each end of themachine, thus allowing for scraping of the floor as the machine moves ineither direction. Owing to the construction of braces B thescraping-tool contacts with the floor at an incline or angle, thuspresenting the sharpest edge of the tool to the wood.

Secured to the beams A of the machine are the vertical uprights D, whichmeet and are united by cross-rod D above the machine.

From said rod depends rod D to which I secure weight D which is adaptedto swing between the uprights and curved braces. As either end of themachine is thrown upward the weight D swings toward the opposite end andholds the same down, so as to give sufficient pressure to thescraping-tool. To the small upright or ear d, projecting from axle B, ispivotally secured guide-rod E, which is provided with elongated slot 6,within which outer ends e of weight D work as the same swing in eitherdirection and serves to maintain the weightin position. 7 r

The handles of the machine, which permit of its being moved across thefloor, are indicated by the letters E E one at each end. These handlesare pivotally secured to beams A, and either one which may not be in useis thrown upward and secured to hooked end f of depending rod F, movablysecured to cross-rod D. When the machine is not in use,both of saidhandles may be held upward by rod F, so as to be out of the way. Aseither of the handles moves downward the same contacts with sideprojections f, so as to act as a lever for throwing either end of themachine downward and shift the swinging weight D To the side beams A, Isecure the casters or supplemental rollers F, which, being pivotallysecured between ears f may be turned upward or under the machine whennot in use. These only serve the purpose of maintaining thescraping-tools from contact with the floor when the machine is to bemoved from the floor or when standing over night, and when the same isin use are thrown upward out of way. When lowered for the purpose ofholding the scraping-tools from contact with the .floor, they are heldsecurely in place by means of bolt or pin g, which works in opening gand keys the shank g rigidly. The hooked I claim as new, and desire tosecure protection in by Letters Patent of the United States, is-

1. The combination, in a floor-scraper, of the tool-holder arranged atan incline, scraping-tools secured therein so as to have theirscraping-edges at an angle to the floor, and the swinging weightsupported above the tool for giving sufficient pressure thereto, as andfor the purpose set forth.

2. The combination of an oscillatory frame, scraping-tools mounted onthe ends of the same, and a shifting weight mounted on a frame above thetools.

3. In a scraping-machine for floors, the combination, with the frame, ofcurved supporting-braces, scraping-tools at the ends of said braces,vertical rods secured to the frame and united by a cross-rod, and theswinging weight supported by said cross-rod and adapted to shift aseither end of the machine is thrown upward, as and for the purpose setforth.

4. The combination of a tilting frame, a swinging weight supportedthereby, tools secured on the ends of the frame, and guiderods adaptedto hold the weight over either end of the frame.

5. The combination of a main frame, tools secured to the ends of thesame, a vertical frame carried thereby, a hook suspended on saidvertical frame, and handles pivoted to the ends of the main frame andadapted to be held in a raised position by the said hook.

6. The combination of the supportingbraces having inwardly-projectingflanges, the tool-holder secured on said flanges, the tools carried bysaid holder, and the adj ustingscrews mounted in the flanges and bearingagainst the tools.

Intestimony whereof I affix my signature in presence of two witnesses.

FREDERICK O. SGHROEDER.

Witnesses:

N. A. ACKER, J. C. MCKEE.

